28290057 has 8 divisors (see below), whose sum is σ = 39938976. Its totient is φ = 17750592.

The previous prime is 28290047. The next prime is 28290061. The reversal of 28290057 is 75009282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28290057 - 2⁷ = 28289929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28290007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277303 + ... + 277404.

It is an arithmetic number, because the mean of its divisors is an integer number (4992372).

Almost surely, 2^28290057 is an apocalyptic number.

It is an amenable number.

28290057 is a deficient number, since it is larger than the sum of its proper divisors (11648919).

28290057 is a wasteful number, since it uses less digits than its factorization.

28290057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554727.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 28290057 is about 5318.8398171030. The cubic root of 28290057 is about 304.7038494159.

The spelling of 28290057 in words is "twenty-eight million, two hundred ninety thousand, fifty-seven".